Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb29a0f3b8ebe1a7…

MALICIOUS

PDF

72.9 KB Created: 2021-03-29 23:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d913f3f8e422c42da890b52b926aaa1d SHA-1: bd83aec8af8f48395b316af8c057a4021a5a1dbe SHA-256: bb29a0f3b8ebe1a771336e75086d19a288c65f8df456a5dedd53ff20e94cfaba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/award?keyword=manual+de+la+nueva+administraci%25C3%25B3n+p%25C3%25BAblica+argentina+pdf PDF link annotation
    • http://fkpravo.ru/nordictrack_treadmill_exp_1000_manualndfc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465025/normal_603e71613cb27.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/igjogi7/nixotaxap.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/gZaw6Rl/crowded_house_sauvignon_blanc_2017.pdfIn PDF document text
    • http://paksorond.xyz/acca_jobs_in_pakistan_armyj9ehf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450428/normal_601f3979e0cdb.pdfIn PDF document text
    • http://duplicwcnj.space/movie_worksheet_the_fabric_of_the_cosmos_quantum_leap_answers_quizlet39yt9.pdfIn PDF document text
    • https://cdn.sqhk.co/baxulamuva/4vPjcgh/tebabafaxemaluxus.pdfIn PDF document text
    • https://cdn.sqhk.co/womafafowix/ejccbhf/laboratory_investigation_28a_earthworm_dissection_answers.pdfIn PDF document text
    • http://bumaga.bz/what_does_lateral_thinking_meanp3pzg.pdfIn PDF document text
    • http://bluebadgeapproval.com/tajogawov3njo.pdfIn PDF document text
    • http://psychologyrelax.xyz/what_is_question_techniques28guw.pdfIn PDF document text
    • http://topcreditscore.info/how_much_does_the_dbz_kakarot_dlc_cost9xeua.pdfIn PDF document text
    • https://cdn.sqhk.co/potonefamuve/6ZGdhhz/fidget_spinner_games_free_online.pdfIn PDF document text
    • http://creditstar-kabinet.com/lelupojibarerugivipebunwyxny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480399/normal_603c0b31316d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403806/normal_5fd611250f31c.pdfIn PDF document text
    • http://salleapp.xyz/gezipufilodoxipikevew2hpa6.pdfIn PDF document text
    • http://cucoupon.info/38368810989h57h9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5febefd033c01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://43a98339-0465-49d0-a416-8cef4780896f.filesusr.com/ugd/89258f_21f1455de2d449df981f95513af0dddb.pdf?index=trueIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_69bdfdd824ce4c7288e660cd4f32bcdb.pdf?index=trueIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_0e30d49ca54e42fd8cdd951d263b5980.pdf?index=trueIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_6d11693521c74588890d0a65d17b88af.pdf?index=trueIn PDF document text
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_cbbe6f7e82de4113bf50da529679105b.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8ED 5932 bytes
SHA-256: 4ffed7a9e1e37aa5b2e26a116cef915ad8d9e2ea49be4b8d92916674901c77ea
font_01_sfnt_off0000eca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA4 11488 bytes
SHA-256: 15c20edace21bd374ad12294219f5fa92c12b8cabda5906a8c213843b151748e